1918963199 has 2 divisors, whose sum is σ = 1918963200. Its totient is φ = 1918963198.

The previous prime is 1918963183. The next prime is 1918963217. The reversal of 1918963199 is 9913698191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1918963199 - 2⁴ = 1918963183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1918963399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959481599 + 959481600.

It is an arithmetic number, because the mean of its divisors is an integer number (959481600).

Almost surely, 2^1918963199 is an apocalyptic number.

1918963199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918963199 is an equidigital number, since it uses as much as digits as its factorization.

1918963199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 56.

The square root of 1918963199 is about 43805.9721841669. The cubic root of 1918963199 is about 1242.6692411434.

The spelling of 1918963199 in words is "one billion, nine hundred eighteen million, nine hundred sixty-three thousand, one hundred ninety-nine".